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STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS
Oelkers, Ryan J.1; Macri, Lucas M.1; Wang, Lifan1,2,3; Ashley, Michael C. B.4; Cui, Xiangqun3,5; Feng, Long-Long2,3; Gong, Xuefei3,5; Lawrence, Jon S.4,6; Qiang, Liu3,7; Luong-Van, Daniel4; Pennypacker, Carl R.8; Yuan, Xiangyan3,5; York, Donald G.9,10; Zhou, Xu3,7; Zhu, Zhenxi2,3
2016-06-01
Source PublicationASTRONOMICAL JOURNAL
Volume151Issue:6
AbstractThe Chinese Small Telescope Array (CSTAR) carried out high-cadence time-series observations of 20.1 square degrees centered on the South Celestial Pole during the 2008, 2009, and 2010 winter seasons from Dome A in Antarctica. The nearly continuous six months of dark conditions during each observing season allowed for >106 images to be collected through gri and clear filters, resulting in the detection of >10(4) sources over the course of three years of operation. The nearly space-like conditions in the Antarctic plateau are an ideal testbed for the suitability of very small-aperture (<20 cm) telescopes to detect transient events, variable stars, and stellar flares. We present the results of a robust search for such objects using difference image analysis of the data obtained during the 2009 and 2010 winter seasons. While no transients were found, we detected 29 flaring events and find a normalized flaring rate of 5 +/- 4 x 10(-7) flare hr(-1) for late-K dwarfs, 1 1 x 10(-6) flare hr(-1) for M dwarfs and 7 1 x 10(-7) flare hr(-1) for all other stars in our sample. We suggest future small -aperture telescopes planned for deployment at Dome A would benefit from a tracking mechanism, to help alleviate effects from ghosting, and a finer pixel scale, to increase the telescope's sensitivity to faint objects. We find that the light curves of non-transient sources have excellent photometric qualities once corrected for systematics, and are limited only by photon noise and atmospheric scintillation.
KeywordMethods: Data Analysis Stars: Flare Stars: Variables: General
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-6256/151/6/166
WOS KeywordDIGITAL SKY SURVEY ; OPTIMAL IMAGE SUBTRACTION ; VARIABLE-STARS ; ECLIPSING BINARIES ; IA SUPERNOVAE ; LIGHT CURVES ; SPACED DATA ; M DWARFS ; PHOTOMETRY ; TELESCOPE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000377990300033
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16254
Collection南极天文中心
Affiliation1.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA
2.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
3.Chinese Ctr Antarctic Astron, Nanjing, Jiangsu, Peoples R China
4.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia
5.Nanjing Inst Astron Opt & Technol, Nanjing, Jiangsu, Peoples R China
6.Australian Astron Observ, N Ryde, NSW, Australia
7.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
8.Lawrence Berkeley Natl Lab, Inst Nucl & Particle Astrophys, Berkeley, CA USA
9.Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA
10.Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA
Recommended Citation
GB/T 7714
Oelkers, Ryan J.,Macri, Lucas M.,Wang, Lifan,et al. STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS[J]. ASTRONOMICAL JOURNAL,2016,151(6).
APA Oelkers, Ryan J..,Macri, Lucas M..,Wang, Lifan.,Ashley, Michael C. B..,Cui, Xiangqun.,...&Zhu, Zhenxi.(2016).STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS.ASTRONOMICAL JOURNAL,151(6).
MLA Oelkers, Ryan J.,et al."STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS".ASTRONOMICAL JOURNAL 151.6(2016).
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